Track

dreem.io.Track

Object for storing instances of the same track.

Attributes:

Name	Type	Description
id		the track label.
instances	list[Instances]	A list of instances belonging to the track.

Source code in dreem/io/track.py

@attrs.define(eq=False)
class Track:
    """Object for storing instances of the same track.

    Attributes:
        id: the track label.
        instances: A list of instances belonging to the track.
    """

    _id: int = attrs.field(alias="id")
    _instances: list["Instance"] = attrs.field(alias="instances", factory=list)

    def __repr__(self) -> str:
        """Get the string representation of the track.

        Returns:
            the string representation of the Track.
        """
        return f"Track(id={self.id}, len={len(self)})"

    @property
    def track_id(self) -> int:
        """Get the id of the track.

        Returns:
            The integer id of the track.
        """
        return self._id

    @track_id.setter
    def track_id(self, track_id: int) -> None:
        """Set the id of the track.

        Args:
            track_id: the int id of the track.
        """
        self._id = track_id

    @property
    def instances(self) -> list["Instances"]:
        """Get the instances belonging to this track.

        Returns:
            A list of instances with this track id.
        """
        return self._instances

    @instances.setter
    def instances(self, instances) -> None:
        """Set the instances belonging to this track.

        Args:
            instances: A list of instances that belong to the same track.
        """
        self._instances = instances

    @property
    def frames(self) -> set["Frame"]:
        """Get the frames where this track appears.

        Returns:
            A set of `Frame` objects where this track appears.
        """
        return set([instance.frame for instance in self.instances])

    def __len__(self) -> int:
        """Get the length of the track.

        Returns:
            The number of instances/frames in the track.
        """
        return len(self.instances)

    def __getitem__(
        self, ind: Union[int, list[int]]
    ) -> Union["Instance", list["Instance"]]:
        """Get an instance from the track.

        Args:
            ind: Either a single int or list of int indices.

        Returns:
            the instance at that index of the track.instances.
        """
        if isinstance(ind, int):
            return self.instances[ind]
        elif isinstance(ind, list):
            return [self.instances[i] for i in ind]
        else:
            raise ValueError(f"Ind must be an int or list of ints, found {type(ind)}")

frames: set[Frame] property

Get the frames where this track appears.

Returns:

Type	Description
set[Frame]	A set of Frame objects where this track appears.

instances: list[Instances] property writable

Get the instances belonging to this track.

Returns:

Type	Description
list[Instances]	A list of instances with this track id.

track_id: int property writable

Get the id of the track.

Returns:

Type	Description
int	The integer id of the track.

__getitem__(ind)

Get an instance from the track.

Parameters:

Name	Type	Description	Default
ind	Union[int, list[int]]	Either a single int or list of int indices.	required

Returns:

Type	Description
Union[Instance, list[Instance]]	the instance at that index of the track.instances.

Source code in dreem/io/track.py

def __getitem__(
    self, ind: Union[int, list[int]]
) -> Union["Instance", list["Instance"]]:
    """Get an instance from the track.

    Args:
        ind: Either a single int or list of int indices.

    Returns:
        the instance at that index of the track.instances.
    """
    if isinstance(ind, int):
        return self.instances[ind]
    elif isinstance(ind, list):
        return [self.instances[i] for i in ind]
    else:
        raise ValueError(f"Ind must be an int or list of ints, found {type(ind)}")

__len__()

Get the length of the track.

Returns:

Type	Description
int	The number of instances/frames in the track.

Source code in dreem/io/track.py

def __len__(self) -> int:
    """Get the length of the track.

    Returns:
        The number of instances/frames in the track.
    """
    return len(self.instances)

__repr__()

Get the string representation of the track.

Returns:

Type	Description
str	the string representation of the Track.

Source code in dreem/io/track.py

def __repr__(self) -> str:
    """Get the string representation of the track.

    Returns:
        the string representation of the Track.
    """
    return f"Track(id={self.id}, len={len(self)})"